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Highlights
- Extensive reverse circulation drilling and mineralogical testing confirm the presence of disseminated nickel and copper sulphides across multiple drill holes in the Mt Vernon area.
- Systematic Micro-XRF analysis of 159 mafic cumulate rock samples from 7 of 9 drilled holes indicates that the Bangemall project may host significant Norilsk-style magmatic Ni-Cu-Co-PGE mineralisation.
- Holding 100% control over 2,190 km² of exploration licences, Miramar Resources (ASX:M2R) secures a dominant land position in a region poised for major nickel-copper discovery.
In Western Australia’s Bangemall region, recent exploration results from the Mt Vernon site have provided compelling geological evidence pointing to a significant nickel-copper province. Data gathered from reverse circulation (RC) drilling has revealed disseminated nickel (Ni) and copper (Cu) sulphides—identified as pentlandite and chalcopyrite, respectively—across several drill holes. These findings offer strong support for the hypothesis that extensive mafic-hosted magmatic processes have played a critical role in the region’s mineralisation history.
Initial testing of a select number of samples through ‘Micro-XRF’ analysis during the August 2024 drilling campaign—underwritten by the Exploration Incentive Scheme (EIS)—provided promising early results. Following this, a comprehensive systematic analysis was conducted on 159 samples of mafic cumulate rocks, collected from 7 out of the 9 drill holes. This rigorous analytical process has confirmed the presence of disseminated sulphide minerals in the rocks, underpinning the concept that an extensive volume of mafic magma, rich in nickel and copper, has interacted with sulphate minerals and undergone differentiation.
The geochemical signatures observed in the samples strongly resemble those associated with Norilsk-style mafic intrusion-hosted magmatic Ni-Cu-Co-PGE sulphide deposits. Such deposits are characterized by their association with large-scale magmatic events, where the process of magma differentiation and sulphide segregation leads to the concentration of valuable metals. The comprehensive dataset collected from the Mt Vernon site suggests that the Bangemall region may have experienced a similar magmatic evolution, potentially leading to the formation of a major new mineral province.
Miramar Resources Ltd (ASX:M2R) has established a first-mover advantage by securing complete control over the exploration licences and applications covering an impressive 2,190 square kilometres of the Bangemall project area. This dominant land position not only provides strategic access to extensive geological data but also positions the project as one of the key regions for exploring significant mafic-hosted mineralisation in Western Australia.
According to the executive chairman of Miramar, the decision to target the Bangemall region was based on a careful analysis of several regional-scale datasets. These datasets indicated a high potential for magmatic mineralisation processes similar to those observed in well-known deposits worldwide. The subsequent fieldwork and laboratory analyses have now validated these initial concepts, demonstrating that mafic magma carrying nickel and copper has indeed assimilated sulphate minerals. The resultant differentiation process has produced mafic cumulate rocks that host disseminated sulphide minerals—a geological environment highly conducive to the eventual formation of an economic deposit.
The comprehensive approach adopted at the Mt Vernon site exemplifies modern exploration techniques, where advanced analytical methods such as Micro-XRF play a pivotal role in identifying key mineralogical signatures. By methodically processing a large suite of samples, the technical team has been able to build a robust geological model of the region. The systematic identification of pentlandite and chalcopyrite across numerous drill holes suggests that the Bangemall region may host extensive mafic-hosted sulphide mineralisation, with potential implications for regional resource development.
In addition to the scientific and technical accomplishments, the strategic land position achieved through 100% control of granted exploration licences across a vast territory provides a significant advantage in the competitive landscape of mineral exploration. This extensive landholding in the Bangemall region not only facilitates continued exploration efforts but also enhances the overall geological understanding of the area. The region’s potential to yield large-scale nickel, copper, cobalt, and potentially platinum group elements (PGE) underscores its importance as a future target for further exploration and detailed geological mapping.
The results from the recent drilling program have laid the groundwork for subsequent phases of exploration. The identification of widespread disseminated nickel and copper sulphides within mafic cumulate rocks indicates that the processes governing sulphide accumulation have been successful on a regional scale. The next phase of exploration will likely involve a detailed investigation into the loci of sulphide accumulation, aiming to delineate areas where these minerals may have concentrated to form higher-grade, economic mineral deposits.
A detailed understanding of the geological history and magmatic evolution of the Bangemall region will be critical for guiding future exploration efforts. Continued geochemical sampling, coupled with advanced geophysical surveys, is expected to further refine the model of sulphide distribution within the mafic cumulate host rocks. Such investigations are essential in identifying the primary zones of enrichment, where the sulphide minerals have been concentrated by magmatic processes. Although the current findings do not constitute a fully economic deposit, the geological indicators point to a promising framework that could eventually lead to the discovery of a significant Ni-Cu-Co-PGE resource.
The exploration activities in the Bangemall region underscore the importance of integrating regional geological data with advanced drilling and analytical techniques. The systematic approach demonstrated at Mt Vernon reflects a broader trend in the mineral exploration industry, where robust datasets and innovative analytical methods are being leveraged to identify and characterize new mineral provinces. In regions with complex geological histories, such as Western Australia’s Bangemall, the ability to combine large-scale regional data with focused, high-resolution sampling can dramatically improve the prospects for discovering new resource opportunities.
This extensive investigation into the Bangemall region has provided a clearer picture of the potential for large-scale magmatic mineralisation. The ongoing research efforts aim to further characterize the sulphide mineralisation and determine the most promising targets for future drilling campaigns. The regional-scale exploration strategy, underpinned by detailed geochemical and mineralogical analyses, has already yielded significant insights into the processes that have shaped the geological framework of the area.
While the current dataset highlights a robust model of mafic intrusion and subsequent sulphide formation, the next stages of exploration will focus on delineating the spatial distribution of these mineralised zones. The objective is to identify areas where sulphide concentrations have reached levels that may warrant further detailed exploration. The geological narrative emerging from the Bangemall project reinforces the potential for discovering significant Ni-Cu-Co-PGE deposits in regions previously considered to be underexplored.
In summary, the exploration results from the Mt Vernon drilling program have confirmed that the Bangemall region in Western Australia represents a significant new nickel-copper province. Advanced analytical techniques and a systematic approach have revealed the presence of disseminated sulphide minerals within mafic cumulate rocks, supporting the hypothesis of extensive Norilsk-style magmatic mineralisation. With a strategic land position covering 2,190 km² and a robust geological framework, the Bangemall project stands as a key area for future exploration initiatives focused on uncovering substantial mafic-hosted mineral deposits.
